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8
votes
3answers
12k views

How to find out if Ubuntu is using DHCP (Ubuntu 12.04 LTS GUI)

How can I find out if my IP address is DHCP, Fixed or Dynamic? I need to tell my network administrator what the IP address is, that my Virtual Machine is using. I know the numbers, but I don't know ...
5
votes
1answer
5k views

UFW: Allow traffic only from a domain with dynamic IP address

I run a VPS which I would like to secure using UFW, allowing connections only to port 80. However, in order to be able to administer it remotely, I need to keep port 22 open and make it reachable from ...
4
votes
3answers
10k views

How to create a custom dynamic DNS solution?

You all probably know commercial dynamic DNS providers like dyndns.org or no-ip.com. But how to create a similar service for just a handful of machines? What server software would be best suited for ...
2
votes
1answer
307 views

SSH Setup - How will the router know my computer's ip?

I'm very new to the networking side of the house and am trying to set up SSH on my new Ubuntu machine. I have my DD-WRT router working with DDNS now and can log in to the router page -- but I'm not ...
2
votes
1answer
2k views

Hosts file on server with dynamic DNS?

I am setting up a RHEL-based server that is associated with dynamic DNS from DynDNS, with a domain of, say, "abc.dyndns.org" that is dynamically updated with the server's IP address. I have read that ...
2
votes
1answer
73 views

Running my own dynamic DNS record hosting

I intend to run a debian server at home, it will host various websites, SSH server and email. I have a dynamic IP address and I am unwilling to pay the extra for a static IP. I was thinking I could ...
2
votes
4answers
2k views

Make nslookup use specific interface

On my computer I have two network cards. Both are using different Internet Providers service. Both Internet service provider have different DNS server and their IP address are known to me. I want to ...
2
votes
1answer
512 views

redirect web server with no-ip and port forwarding in livebox

I want my Apache web server running on a Livebox (home router appliance running Linux) to be accessible from the Internet (WAN). I installed and configured the application noip2 on my Ubuntu PC. ...
1
vote
2answers
722 views

How can my server detect IP changes in order to notify my dynamic-DNS provider?

Just set up ubuntu server, which has a dynamic ip. I am looking for a way to keep my dns server updated. Im using entrydns to do this and they provide the following command to update the server. curl ...
1
vote
1answer
18 views

Visitors cannot reach my local apache server

I have a machine running the client of noip to provide dynamic DNS. This machine is in a network where I put its ip on the DMZ because I want visitors acessing its services. I am succesfull on ...
1
vote
1answer
66 views

DDNS (dynamic-dns) setup and adding a hostname to a device (to be visible on the network)

How do I provide a fixed Hostname to my device so that a netscan can shows up the device name across all platforms? How can I reach the device using the hostname/MAC-ID (something which is fixed) ...
1
vote
0answers
18 views

how to ensure stable domain names for newly-provisioned cloud server instances?

I've been playing with server configuration management tool Ansible, whose use often depends on reference to a local inventory file containing arbitrary host names. For example, # file: my_hosts ...
1
vote
0answers
36 views

Deliver emails outside network, from a server behind router DNS and port forwarding

I've been trying to configure webserver to deliver emails outside the local network. Server is connected directly to the router and relay on its DNS service, and one of that online service for resolve ...
0
votes
1answer
298 views

Apache subdomain can not be resolved

<VirtualHost *:80> ServerAdmin webmaster@localhost ServerName domain.no-ip.org ServerAlias www.domain.no-ip.org DocumentRoot /var/www/main ErrorLog ...
0
votes
2answers
157 views

DenyHosts and no-ip.com

I recently installed DenyHosts and after a few remote logins I noticed that sshd: 8.23.224.110 had been added to the host.deny file after /var/log/auth.log showed a few sshd: Did not receive ...
0
votes
0answers
14 views

Example of submitting dns change to dns0matic?

My ISP has been changing my IP regularly so I'm trying to use dns-o-matic to keep things straight. I do have an account and I've read their API docs and even talked with their tech people. However, ...
-2
votes
1answer
38 views

Hardware configuration required for DNS server

How can I know Hardware configuration required for DNS server: What will be the expected QPS (Queries Per Second) on the server. 5/Sec and peak time 10-20/Sec How many hosts will be ...